Please help to find out where're slow parts

help
1

Hi everyone.

I implemented a dialog system in Rust
it took approx 60ms(release mode) 280ms(debug mode) for each request

it's slower than my expect

The crates I used were:

  1. Axum(0.16)
  2. Redb(1.0.5)
  3. serde and serde_json (latest)
  4. rkyv (latest)

Running machine was

  1. Windows 10 Home Edition
  2. Intel i3-380M (2010)
  3. SSD hard drive
  4. 8G Memory

I captured a flamegraph

屏幕截图 2023-07-28 150117
屏幕截图 2023-07-28 1501171182×93 8.45 KB

Raw SVG was here:

But I don't know which part made it slow

Thanks in advance

2

We aren't going to be able to help you much without seeing some code.

That said, looking at the flame graph it seems a fair amount of time is being spent on Vec operations, and I assume the libc stuff is allocation, so a place to start would be to ensure vectors are preallocated (using Vec::with_capacity()) and check for unnecessary clone()s.

3

I might found the issue, it's database connection.

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